Attorney Alan Dershowitz said Wednesday that his argument against the impeachment of President Trump is not political and would apply the same to a Democratic president.

Dershowitz, a lifelong Democrat and civil libertarian who voted against Trump, has been criticized by many on the left for what they see as a bias in favor of Trump, including in his new book.

He explained that in "The Case Against Impeaching Trump," he is only making arguments similar to those he made against the impeachment of then-President Bill Clinton.

"We've come to a position in this country where you can't even read a book that may help the opposing side without being criticized," Dershowitz said on "America's Newsroom," joking that he's come up with a way that readers can enjoy "The Case Against Impeaching Trump" in liberal havens like Martha's Vineyard without being criticized.

"I asked my publisher to come up with a brown paper cover like the kind you put on 'dirty books,'" Dershowitz said.

He added that because he would have similarly defended the civil liberties of Hillary Clinton had she won the presidency, he also had his publisher come up with an interchangeable cover: "The Case Against Impeaching Clinton."

“It’s the same book, it just has a different name,” Dershowitz said. “Because I’m a neutral, objective civil libertarian and it doesn’t matter what side the person is on. I want to preserve everybody’s civil liberties.”